UPBGE - setting a Rigid Body Joint to 'breakable' with Python?
got it

https://shuvit.org/python_api/bge.types.KX_ConstraintWrapper.html#KX_ConstraintWrapper.breakingThreshold

you create the constraint -> set the breaking threshold 

constraint = constraints.createConstraint(#args)
force = 10
constraint.breakingThreshold = force


etc